Forum Moderators: Robert Charlton & goodroi
Does Spam In Google Analytics Result In Bad User Metrics For SERPS?
Google's not going to automatically remove it because if they did there were would be screams about yet more overreach.
There are also a few suggestions for blocking in .htaccess or Apache - I've tried a few of these, but only had limited success with it.
You can only block visits to your own site. As I understand it, the current problem is with people* who proceed directly to analytics, which lives on google's servers. They don't even bother to visit the site itself, because they can achieve the same purpose without it. There's a longish recent thread-- which, naturally, I now can't find-- about referer spam in analytics.